NumberResearch Membership · Data 09/29/2026

Recent prefix assignments

347 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/29/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 43
NEW CINGULAR WIRELESS PCS, LLC - DC 28
Rogers Communications Canada Inc. (Wireless) 23
NEW CINGULAR WIRELESS PCS, LLC - IL 23
ONVOY, LLC - CA 19
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2018-07-09 226-803 not yet reported which blocks → Iristel Inc. 154E Windsor —
2018-07-09 249-510 not yet reported which blocks → Iristel Inc. 154E Peterborough —
2018-07-09 343-339 not yet reported which blocks → Iristel Inc. 154E Merrickville —
2018-07-09 506-497 not yet reported which blocks → Iristel Inc. 154E Woodstock —
2018-07-09 639-386 not yet reported which blocks → Iristel Inc. 154E Kipling —
2018-07-09 737-980 0XXX1XXX2XXX3XXX4XXX5XXX8XXX9XXX · 5 holders which blocks → INVOXIO INCORPORATED 158H COUPLAND TX
2018-07-09 902-713 not yet reported which blocks → Iristel Inc. 154E Kentville —
2018-07-09 914-335 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 WSCHSTZN04 NY
2018-07-09 929-480 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E NWYRCYZN06 NY
2018-07-09 939-210 0–9 XXXall 10 · 4 holders which blocks → SUNCOM DBA T-MOBILE USA 8645 CAGUAS PR
2018-07-06 208-923 0XXX1XXX2XXX3XXX4XXX5XXX8XXX · 4 holders which blocks → ONVOY, LLC - ID 689F GARDEN VLY ID
2018-07-06 208-974 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLC - ID 689F HOMEDALE ID
2018-07-06 249-508 not yet reported which blocks → Iristel Inc. 154E Algoma Mills —
2018-07-06 249-509 not yet reported which blocks → Iristel Inc. 154E Campbellford —
2018-07-06 365-399 not yet reported which blocks → Iristel Inc. 154E Cobourg —
2018-07-06 587-715 not yet reported which blocks → Iristel Inc. 154E Blackfalds —
2018-07-06 587-912 not yet reported which blocks → Iristel Inc. 154E Coaldale —
2018-07-06 641-501 0XXX1XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → WINDSTREAM MONTEZUMA, LLC 1248 MONTEZUMA IA
2018-07-06 712-897 7XXX9XXX · 2 holders which blocks → WINDSTREAM IOWA COMMUNICATIONS, INC. - SYSTEMS 1170 AVOCA IA
2018-07-06 873-547 not yet reported which blocks → Videotron Ltd. 8306 St-Malo —
2018-07-06 873-548 not yet reported which blocks → Videotron Ltd. 8306 Scotstown —
2018-07-06 959-204 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CT 6388 HARTFORD CT
2018-07-05 239-880 0–9 XXXall 10 · 3 holders which blocks → INVOXIO INCORPORATED 158H NO NAPLES FL
2018-07-05 239-920 0–9 XXXall 10 · 4 holders which blocks → INVOXIO INCORPORATED 158H NAPLES FL
2018-07-05 249-804 not yet reported which blocks → Iristel Inc. 154E Sudbury —
2018-07-05 431-808 not yet reported which blocks → Iristel Inc. 154E Winnipeg —
2018-07-05 571-394 0–9 XXXall 10 · 6 holders which blocks → METROPCS, INC. 5562 TRIANGLE VA
2018-07-05 571-404 0–9 XXXall 10 · 8 holders which blocks → NUSO, LLC 551G BRADDOCK VA
2018-07-05 579-502 not yet reported which blocks → Iristel Inc. 154E Joliette —
2018-07-05 804-821 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 CHESTER VA
2018-07-05 873-741 not yet reported which blocks → Iristel Inc. 154E Plessisville —
2018-07-05 902-712 not yet reported which blocks → Iristel Inc. 154E Alberton —
2018-07-04 343-804 not yet reported which blocks → Iristel Inc. 154E Ottawa-Hull —
2018-07-04 343-805 not yet reported which blocks → Iristel Inc. 154E Ottawa-Hull —
2018-07-04 365-598 not yet reported which blocks → Iristel Inc. 154E Thornhill —
2018-07-04 873-545 not yet reported which blocks → Videotron Ltd. 8306 East Hereford —
2018-07-04 873-546 not yet reported which blocks → Videotron Ltd. 8306 St-Sebastien (Frontenac Co.) —
2018-07-03 424-417 0–9 XXXall 10 · 5 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SAN PEDRO CA
2018-07-03 430-243 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - TX 004F HENDERSON TX
2018-07-03 469-492 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 FRISCO TX
2018-07-03 518-987 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E GALWAY NY
2018-07-03 647-659 not yet reported which blocks → Bell Mobility 6574 Toronto —
2018-07-03 716-455 0–9 XXXall 10 · 7 holders which blocks → BANDWIDTH.COM CLEC, LLC - NY 997E GOWANDA NY
2018-07-03 737-770 0–9 XXXall 10 · 5 holders which blocks → INVOXIO INCORPORATED 158H BUDA TX
2018-07-03 803-836 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - SC 077F HICKORYGRV SC
2018-07-03 803-846 0–9 XXXall 10 · 2 holders which blocks → METROPCS, INC. 5562 COLUMBIA SC
2018-07-03 803-861 0–9 XXXwhole prefix which blocks → NUSO, LLC 551G COLUMBIA SC
2018-07-03 815-974 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 7 holders which blocks → ONVOY, LLC 224C HEBRON IL
2018-07-03 873-543 not yet reported which blocks → Videotron Ltd. 8306 Cookshire —
2018-07-03 873-544 not yet reported which blocks → Videotron Ltd. 8306 Weedon —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/29/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.